Efficient new laptops can run multiple programs without sucking extra wattage. That’s because they pace themselves. Their processors can shut down partially when the screen is static or when running simple tasks, and ramp up to full steam when big programs call for it.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.